#version 300 es
// OpenGL ES3.0外部纹理扩展
#extension GL_OES_EGL_image_external_essl3:require
precision mediump float;
uniform samplerExternalOES uTexSampler;
in vec2 texPos;
out vec4 fragColor;
void main() {
    fragColor=texture(uTexSampler, texPos);
}